Senior Multiphysics Simulation Engineer

As a Senior Multiphysics Modeling Engineer at Helion, you will be at the forefront of innovation, developing advanced modeling solutions to tackle complex engineering challenges. Your expertise in multiphysics simulations will drive the design and optimization of our cutting-edge technologies aimed at revolutionizing the energy sector.

Join Helion: Pioneering Clean EnergyAt Helion, based in Everett, WA, our mission is to create the world’s first fusion power plant, revolutionizing energy production with limitless clean electricity. We envision a world where everyone has access to reliable and affordable energy.Since our inception in 2013, we have secured over $1 billion in funding from esteemed investors, including Sam Altman, Mithril, and Capricorn Investment Group, alongside new partners like SoftBank and Lightspeed. Our latest prototype, Trenta, successfully completed 10,000 high-power pulses, achieving plasma temperatures of 100 million degrees Celsius (9 keV). We are now advancing with Polaris, our next prototype on the journey to realizing the world's first fusion power facility.This is a critical moment to become part of Helion. You will confront real-world engineering challenges with a team that values urgency, rigor, accountability, and an unwavering commitment to transparency – all crucial to achieving unprecedented milestones. Together, we will reshape the future of energy, as the world cannot afford to wait.Your Role:As a Senior Electrical Simulation Engineer, you will spearhead the development and validation of intricate circuit and system models that inform design choices and ensure the safe, stable functioning of our fusion systems. You will construct plant-level models to evaluate performance, analyze subsystem interactions, and confirm adherence to relevant standards and regulations. Collaborating with interdisciplinary teams, you will model and simulate the pulsed power devices, circuits, and physics essential for fusion machine operation. By merging hands-on laboratory work with advanced simulation techniques, you will enhance our capability to accurately depict complex electrical systems with confidence, thereby ensuring the scalability of our fusion machines.Your Responsibilities Include:Leading the development and validation of electrical simulation models at both circuit and system levels.Integrating electrical models with mechanical, thermal, and control simulations to assess multidisciplinary interactions and optimize overall system performance.Creating automation scripts to facilitate repeatable, automated simulation processes.Collaborating with hardware, firmware, and software engineers to support system integration and root-cause analysis.Evaluating and implementing new simulation tools and methodologies to enhance model accuracy, efficiency, and scalability.

About Helion EnergyHelion Energy is at the forefront of revolutionizing energy production. Based in Everett, WA, our mission is to construct the world's first fusion power plant, paving the way for a future marked by limitless clean electricity. We envision a world where energy is not just clean and reliable, but also affordable for everyone.Founded in 2013, we have successfully raised over $1 billion from esteemed investors, including Sam Altman, Mithril, and Capricorn Investment Group, as well as notable newcomers like SoftBank and Lightspeed. Our latest prototype, Trenta, has completed 10,000 high-power pulses, achieving plasma temperatures of 100 million degrees Celsius (9 keV). Currently, we are advancing with Polaris, our next prototype, on the journey to the world’s first fusion power plant.This is an exciting opportunity to join Helion Energy at a pivotal moment. You will face real-world engineering challenges within a team that values urgency, diligence, ownership, and the courage to share hard truths—qualities that are fundamental to achieving unprecedented goals. Together, we will redefine the future of energy because the world cannot afford to wait.

About HelionAt Helion, we are pioneering the future of energy as a leading fusion power company located in Everett, WA. Our mission is to create the world's first fusion power plant, which will provide limitless clean electricity. We envision a future where energy is clean, reliable, and affordable for everyone.Since our inception in 2013, we have successfully attracted over $1 billion from esteemed investors including Sam Altman, Mithril, and Capricorn Investment Group, alongside newcomers such as SoftBank and Lightspeed. Our latest prototype, Trenta, achieved an impressive milestone of 10,000 high-power pulses, reaching plasma temperatures of 100 million degrees Celsius (9 keV). Currently, we are advancing with Polaris, our next prototype on the journey towards realizing the world's first fusion power plant.This is an exciting time to join Helion. You will have the opportunity to address significant challenges as part of a team that values urgency, precision, accountability, and the courage to communicate hard truths—attributes crucial for accomplishing unprecedented feats. Together, we will redefine the future of energy because the world cannot afford to wait.

Join our innovative team at helion as a Senior Engineering Technician in Hardware Development. In this pivotal role, you will leverage your expertise to contribute to the design, testing, and implementation of cutting-edge hardware technologies. Your hands-on experience will be crucial in ensuring our products meet the highest standards of performance and reliability.

Join Helion as a Senior Manager of Mechanical Engineering specializing in Modules and lead our innovative engineering team. In this pivotal role, you will oversee the design, development, and implementation of advanced mechanical systems that drive our projects forward. Collaborate closely with cross-functional teams to ensure that our engineering solutions meet both performance and regulatory requirements.

Join Helion Energy: Pioneering Fusion PowerAt Helion Energy, based in Everett, WA, we are on a mission to revolutionize the world's energy landscape by building the first-ever fusion power plant. Our vision is to create a future where clean, reliable, and affordable energy is accessible to all.Founded in 2013, we've successfully raised over $1 billion from esteemed investors, including Sam Altman and SoftBank, to advance our groundbreaking technologies. With our latest prototype, Polaris, we are achieving unprecedented results, including reaching plasma temperatures exceeding 100 million degrees Celsius. The time to join our mission is now, as we strive to bring fusion energy to the forefront of global power solutions.As part of our dynamic team, you will confront real-world challenges while embodying our core values of urgency, rigor, and accountability. Together, we will shape the future of energy because the world cannot afford to wait.Your Role and Responsibilities:As a Senior Software Engineer specializing in Network and Performance, you will take charge of the architecture and reliability of our communication networks, ensuring seamless connectivity between our fusion systems. You will design, validate, and implement networking solutions that guarantee deterministic control, precise time synchronization, high throughput, and fault tolerance across thousands of devices. Your expertise will be critical in evaluating and deploying advanced networking technologies that support safe and efficient machine operations.Collaboration is key in this role. You will work closely with security engineers to fortify our networks against potential threats, partner with electrical systems engineers to define system interfaces, and liaise with hardware and software teams to integrate networking requirements into the overall system architecture. This hands-on position will require you to configure switches, prototype innovative approaches, and conduct rigorous testing to ensure our plant-wide networking infrastructure is ready for future demands.This is an onsite position reporting directly to the Lead Electrical Engineer at our Everett, WA office.

About Helion EnergyHelion Energy is at the forefront of the fusion power revolution, located in Everett, WA. Our ambitious mission is to construct the world’s first fusion power plant, paving the way for a future where clean, unlimited electricity is accessible to all. We envision a world powered by reliable, sustainable, and affordable energy.Since our inception in 2013, we have successfully raised over $1 billion from esteemed investors including Sam Altman, Mithril, and Capricorn Investment Group, along with new partners like SoftBank and Lightspeed, all fueling our journey forward. Our latest prototype, Trenta, has achieved remarkable milestones, including 10,000 high-power pulses and plasma temperatures soaring to 100 million degrees Celsius (9 keV). We are currently advancing our Polaris prototype, which is crucial in our quest for the first operational fusion power plant.Joining Helion Energy at this critical juncture means you will face significant real-world challenges alongside a team that values urgency, ownership, integrity, and transparency—qualities essential for achieving groundbreaking advancements in energy. Together, we are poised to redefine the future of power generation, as the world cannot afford to wait.Your Role:As our Senior Electrical Systems Engineer, you will play a pivotal role in bringing our next-generation fusion power systems to fruition. You will take charge of integrating electrical subsystems into a unified, dependable system, ensuring seamless functionality across power, control, and communication networks. Your responsibilities will include designing and producing electrical harnesses that interconnect our machines, managing cross-disciplinary interfaces through precise requirements and Interface Control Documents (ICDs), and collaborating directly with suppliers to facilitate the production of essential hardware. This position requires a blend of in-depth hands-on engineering skills and system-level oversight, perfectly suited for engineers who excel in both detailed and broad perspectives. You will be reporting directly to the Electrical Engineering Lead in this onsite position at our Everett, WA office.Key Responsibilities:Oversee the integration of electrical components and subsystems into comprehensive systems.Establish, uphold, and enforce system-level requirements and interface control documents (ICDs) across electrical, mechanical, and software teams.Lead the design, documentation, and validation of electrical harnesses, ensuring manufacturability, reliability, and compliance with industry standards.Collaborate with and manage harness suppliers—delivering build packages, reviewing prototypes, and qualifying production deliveries.Engage in hands-on lab work during system bring-up, troubleshooting integration issues, and validating end-to-end functionality.

About Helion EnergyHelion Energy is at the forefront of the fusion power revolution. Based in Everett, WA, our mission is to create the world’s first fusion power plant, paving the way for a future where clean, limitless electricity is available to all. Our vision encompasses a world powered by reliable, sustainable energy sources, ensuring affordability for everyone.Since our inception in 2013, we have attracted over $1 billion in investments from notable figures and firms like Sam Altman, Mithril, Capricorn Investment Group, SoftBank, and Lightspeed. Our recent prototype, Trenta, has successfully completed 10,000 high-power pulses, achieving plasma temperatures of 100 million degrees Celsius (9 keV). We are currently advancing with Polaris, our next prototype, on the journey toward establishing the first-ever fusion power plant.Joining Helion now is a unique opportunity to engage with real-world challenges alongside a team that values urgency, rigor, accountability, and a commitment to transparency. These principles are critical as we strive to achieve breakthroughs in energy technology that will transform the future.

Join Helion as a Senior Engineering Technician specializing in Fluid Systems, where you will play a crucial role in designing and implementing innovative fluid systems solutions. Your expertise will directly contribute to the development of cutting-edge technologies that drive our mission forward.

Join Helion’s Mission for Clean EnergyHelion Energy, based in Everett, WA, is pioneering the development of the world’s first fusion power plant, aimed at providing unlimited clean electricity for a sustainable future. Our vision is to create a world where energy is clean, reliable, and affordable for all.Since our inception in 2013, we have successfully raised over $1 billion from esteemed investors including Sam Altman, Mithril, Capricorn Investment Group, SoftBank, and Lightspeed, driving our innovative journey forward. Our latest prototype, Trenta, has achieved remarkable milestones with 10,000 high-power pulses and plasma temperatures reaching 100 million degrees Celsius. Currently, we are advancing with Polaris, our next prototype, which will bring us closer to realizing the first fusion power plant.This is an exciting opportunity to join Helion during a transformative period. You will confront significant challenges alongside a team that values urgency, rigor, accountability, and a commitment to transparency—attributes essential for achieving groundbreaking advancements in energy solutions. Together, we can shape the future of energy, because the world cannot afford to wait.Your Role as a Test Engineer:As a Senior Test Engineer, you will play a crucial role in designing, building, and maintaining electrical test systems that validate PCBAs, power electronics, and high-voltage assemblies integral to our fusion generators. You will collaborate closely with design engineers and technicians to ensure that our test infrastructure is robust, repeatable, and safe for hands-on execution.Your contributions will directly facilitate faster hardware iterations, enhance first-pass yield, and ensure the dependable delivery of mission-critical electrical systems that underpin Helion’s fusion generators and pulsed-power architecture. This position is hands-on, lab-based, and will report directly to the Production Manager.Your Responsibilities Include:Design and implement electrical test systems for PCBA and high-voltage assemblies, encompassing test rack architecture, fixture design, instrumentation selection, and automation support.Develop test fixture PCBAs for use in test racks, managing schematic capture, layout, review, and bring-up for functional validation of production hardware.Construct, wire, debug, and maintain complete test racks and fixtures, ensuring power distribution, safety interlocks, signal routing, and data acquisition integration are effective.Enhance data acquisition and control tools to streamline testing processes.

Join Helion: Pioneering Fusion EnergyAt Helion, located in Everett, WA, our ambition is to create the world’s first fusion power plant, paving the way for a future where clean, abundant electricity is available to all. With a vision of sustainable energy, we strive to make reliable and affordable power a reality.Since our inception in 2013, we have secured over $1 billion in investments from renowned supporters including Sam Altman, Mithril, and Capricorn Investment Group, alongside new backers like SoftBank and Lightspeed. Our recent prototype, Trenta, successfully reached plasma temperatures of 100 million degrees Celsius through 10,000 high-power pulses. Currently, we are advancing with Polaris, the next step towards our groundbreaking fusion power plant.This is an exciting moment to become a part of Helion. You will confront real-world engineering challenges as part of a dynamic team that values urgency, accountability, and the pursuit of truth—qualities essential for achieving unprecedented feats in energy innovation.

Join Helion's Mission to Transform EnergyHelion is at the forefront of the fusion power revolution, located in Everett, WA. Our goal is to construct the world's first fusion power plant, paving the way for a future filled with boundless clean electricity. We envision a global landscape where energy is clean, dependable, and affordable for all.Since our inception in 2013, we have successfully raised over $1 billion from esteemed investors, including Sam Altman, Mithril, and Capricorn Investment Group, along with new partners such as SoftBank and Lightspeed. Our latest prototype, Trenta, achieved an impressive milestone of 10,000 high-power pulses while reaching plasma temperatures of 100 million degrees Celsius (9 keV). Currently, we are advancing with Polaris, our next prototype, as we strive towards the realization of the world’s first fusion power plant.This is an ideal moment to become a part of Helion. You will face real-world challenges alongside a team that values urgency, rigor, ownership, and the courage to confront hard truths. These principles are vital to achieving unprecedented success. Together, we will redefine the future of energy because time is of the essence.Your Role and Responsibilities:As a Senior Manufacturing Engineer, you will be pivotal in designing, implementing, and optimizing the production processes for our in-house capacitors. This position offers a rare chance to collaborate with various teams (Supply Chain, Production, Engineering, Test Operations), significantly impacting the commissioning timeline for Helion's inaugural power plant, and laying the foundation for our transition to mass generator manufacturing. This role is based onsite at our Everett, WA office, and you will report directly to the Senior Manager of Capacitor Manufacturing.Key Responsibilities Include:Design and implement rate-based assembly processes with collaborative support from Production and Engineering teams.Lead and oversee interdisciplinary projects aimed at enhancing the rate and throughput of the capacitor line, including aspects such as floor layout, tooling, build cells, and large-scale equipment.Assist in developing new business processes related to non-conformance management, process control, process safety, and asset maintenance to expand production capabilities and establish a robust foundation for high-volume production.Collect and analyze data (labor hours, cycle times, fallout) to identify production bottlenecks, and propose and implement effective solutions (design changes, process adjustments, equipment upgrades, automation).Spot high return-on-investment opportunities, including essential capital equipment and software capabilities that enhance manufacturing processes, in partnership with Production, Finance, Operations, and Facilities teams.Collaborate on the development of future processes while supporting and executing on existing projects.

About HelionHelion is a pioneering fusion power company located in Everett, WA, dedicated to the ambitious goal of creating the world’s first fusion power plant. Our mission is to provide unlimited clean electricity, contributing to a sustainable future where energy is both reliable and affordable for everyone.Since our inception in 2013, we have successfully raised over $1 billion from esteemed investors, including Sam Altman, Mithril, Capricorn Investment Group, SoftBank, and Lightspeed. Our latest prototype, Trenta, achieved remarkable milestones, completing 10,000 high-power pulses and reaching plasma temperatures of 100 million degrees Celsius (9 keV). Currently, we are advancing our efforts with Polaris, our next prototype on the journey to realizing the first fusion power plant.This is a transformative moment to join Helion. You will address pressing global challenges alongside a team that values urgency, accountability, and a commitment to transparency—qualities that are crucial for achieving unprecedented energy solutions. Together, we are poised to shape the future of energy, because the world cannot wait.

Join Helion as a Senior Materials Engineer with a focus on Ceramic Fabrication. This pivotal role will enable you to lead innovative projects, develop advanced ceramic materials, and leverage your expertise to enhance product performance. Collaborate with cross-functional teams to drive material design and process improvements while mentoring junior engineers.

About Helion EnergyHelion Energy is at the forefront of the fusion power revolution, headquartered in Everett, WA. Our mission is to construct the world’s first fusion power plant, paving the way for a future filled with limitless clean electricity. Our vision encompasses a world where energy is not only clean and reliable but also affordable for all.Since our inception in 2013, we have secured over $1 billion in funding from esteemed investors including Sam Altman, Mithril, and Capricorn Investment Group, along with recent investments from SoftBank and Lightspeed. Our latest prototype, Trenta, achieved 10,000 high-power pulses, reaching plasma temperatures of 100 million degrees Celsius (9 keV). Currently, we are operating Polaris, our next prototype on the journey towards the world’s first fusion power plant.This is an exciting moment to join Helion Energy. You will address real-world challenges alongside a team that values urgency, diligence, accountability, and a commitment to transparency – values that are crucial for achieving unprecedented milestones. Together, we will reshape the future of energy, as the world cannot afford to wait.

About HelionHelion is a pioneering fusion power company situated in Everett, WA, dedicated to realizing the world's first fusion power plant. Our mission is to facilitate a future with boundless clean electricity, ensuring energy is both reliable and affordable for all. Founded in 2013, we have successfully secured over $1 billion in funding from esteemed investors including Sam Altman, Mithril, and Capricorn Investment Group, alongside new partners like SoftBank and Lightspeed, driving our ambitious vision forward. Our latest prototype, Trenta, achieved a remarkable 10,000 high-power pulses and reached plasma temperatures of 100 million degrees Celsius (9 keV). Currently, we are advancing our next prototype, Polaris, as we move closer to creating the first fusion power plant in the world.This is an exciting moment to become part of Helion. You will face significant real-world challenges alongside a team that values urgency, rigor, ownership, and the courage to communicate hard truths—core principles vital for accomplishing unprecedented goals. Together, we will reshape the future of energy, as the world cannot afford to wait.Your Role:As a Senior Mechanical Engineer, you will take charge of hardware designs for Helion's fusion generator prototypes, addressing complex engineering challenges essential for global fusion energy deployment, while also fostering a positive team culture. You will work closely with our Manager of Mechanical Engineering in a hands-on, onsite capacity at our Everett, WA office.Your Responsibilities:Lead and refine subsystem designs, including electromagnetic, structural, fluid, thermal, and control systems, enhancing their specifications.Employ historical engineering methodologies to innovate hardware solutions and conduct rigorous testing.Optimize subsystem and component designs for scalability in high-volume manufacturing environments.Utilize 3D CAD software (e.g., NX, Solidworks) to design fusion hardware.Conduct analyses using tools such as ANSYS, facilitating design reviews to gather feedback and iterate toward fully functional systems.Learn from seasoned experts to enhance your engineering skills and domain expertise.Collaborate closely with experienced technicians to implement your hardware designs effectively.Troubleshoot hardware issues that may arise during the integration of fusion generators.

About Helion EnergyHelion Energy is a pioneering fusion power company located in Everett, WA, dedicated to realizing a vision of a world where clean, reliable, and affordable energy is accessible to all. Our mission is to construct the world's first fusion power plant, heralding a future powered by limitless clean electricity.Since our inception in 2013, we have successfully secured over $1 billion in funding from esteemed investors, including Sam Altman, Mithril, and Capricorn Investment Group, alongside newer partners like SoftBank and Lightspeed. Our latest prototype, Trenta, has impressively completed 10,000 high-power pulses, achieving plasma temperatures of 100 million degrees Celsius (9 keV). We are currently working on Polaris, our next prototype, as we progress toward our goal of establishing the first fusion power plant worldwide.Now is a critical moment to join our team at Helion Energy. You will engage in solving significant challenges alongside a dedicated team that values urgency, rigor, accountability, and a commitment to facing hard truths—principles essential for accomplishing unprecedented achievements in energy innovation.Your Responsibilities:We are seeking a Senior Supplier Development Engineer to collaborate closely with suppliers in the production of components for fusion generators. You will address technical challenges, enhance our suppliers' quality systems, and facilitate Helion's transition from rapid prototyping to large-scale generator manufacturing, driving our mission of delivering clean energy to the globe. This position is based on-site and reports directly to the Senior Manager of Electrical Engineering at our Everett, WA office.Work collaboratively with design engineers to thoroughly understand part, assembly, and sub-system design intents.Evaluate suppliers' manufacturing processes and quality systems to source parts, in conjunction with the procurement team.Assist in product ramping from new product introduction to high-volume manufacturing.Establish technical and quality specifications for suppliers based on engineering and program requirements.Implement and track the Production Part Approval Process (PPAP) with selected suppliers to enhance production rates.Ensure suppliers are equipped to meet documentation submission requirements (e.g., first article inspection reports, quality documentation).Develop and validate process controls for critical characteristics.Propose technical product enhancements to mitigate risks and reduce potential defect opportunities.

About HelionHelion is a pioneering fusion power company located in Everett, WA, dedicated to creating the world's first fusion power plant. Our goal is to facilitate a future with limitless clean electricity, ensuring that energy is clean, reliable, and affordable for all.Founded in 2013, we have successfully raised over $1 billion from esteemed investors including Sam Altman, Mithril, and Capricorn Investment Group, as well as newer partners like SoftBank and Lightspeed. Our latest prototype, Trenta, achieved remarkable milestones with 10,000 high-power pulses and plasma temperatures soaring to 100 million degrees Celsius (9 keV). Currently, we are advancing our next prototype, Polaris, on our journey towards the first operational fusion power plant.Joining Helion at this crucial stage provides a unique opportunity to tackle significant challenges alongside a team that values urgency, rigor, accountability, and transparency—qualities essential to achieving unprecedented breakthroughs in energy. Together, we will redefine the future of energy, because time is of the essence.